{
volScalarField alphaEff_0_025("alphaEff_0_025",turbulence->nu()/Pr_0_025);

fvScalarMatrix TEqn_0_025
(
fvm::ddt(T_0_025)
+ fvm::div(phi, T_0_025)
- fvm::laplacian(alphaEff_0_025, T_0_025)
+ U.component(0)*gamma_0_025     //if your flow is periodic in y or z directions, e.g. component(1) or  //component(2).
);

TEqn_0_025.solve();
}
